Results 31 to 40 of about 2,971 (197)

Gaussberg: volcanology and petrology

, 2020
Photomicrographs of representative lamproite lavas and enclaves from ...
Smellie, J. L., Collerson, K. D.
openaire   +3 more sources

Response of Remote Tropical West Pacific Islands to Climate Variability: A Multiproxy Record From T‐Lake, Palau, Spanning the Early Holocene to Present

Archaeometry, EarlyView.
ABSTRACT Lake sediments are natural archives of past environmental dynamics and how these systems have responded to past climate variability. Sediment geochemistry, governed by local geology and climate processes, is unique to each lake‐catchment and geochemical proxies must be validated for each study site.
Jalene Nalbant, Larissa Schneider, Jessica L. Blois, Matthew Wolhowe, Julian P. Sachs, Simon G. Haberle, Geoffrey Clark   +6 more
wiley   +1 more source

Contrasting Volcanic Deformation in Arc and Ocean Island Settings Due To Exsolution of Magmatic Water

Geochemistry, Geophysics, Geosystems, 2022
Two of the most widely observed co‐eruptive volcanic phenomena—Ground deformation and volcanic outgassing—Are fundamentally linked via the mechanism of magma degassing and the development of compressibility, which controls how the volume of magma changes
Stanley Tze Hou Yip, Juliet Biggs, Marie Edmonds, Philippa Liggins, Oliver Shorttle   +4 more
doaj   +1 more source

Metamorphic or Igneous Zircon? Classification Through Rare Earth Elements, Machine Learning and Logistic Regression

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Zircon is a common, highly refractory accessory mineral found in sedimentary, igneous and metamorphic rocks that forms through various processes (e.g., magmatic, hydrothermal, metamorphic growth and recrystallization). Trace element compositions of detrital zircon have been widely applied to understanding tectonic processes and continental ...
Jarrod M. Burges, Chris Yakymchuk, Michael P. DiMaio, Timothy C. C. Lui, Anirudh Prabhu, Shaunna M. Morrison   +5 more
wiley   +1 more source

Fault‐Controlled Permeability: A Key Parameter in Geothermal Electricity Production Assessment

Terra Nova, EarlyView.
ABSTRACT Geothermal energy is central to the global green energy transition, but its development has long focused on regions with positive thermal anomalies. Through a semi‐quantitative global‐scale review and spatial analysis of 361 geothermal sites, we show that 56.2% of global geothermal electricity production occurs in regions with thermal ...
Vincent Roche, Gaétan Milesi
wiley   +1 more source

Salt Range Formation of Pakistan Preserves Unique Record of Volcanic Fertilization During the Ediacaran Shuram Excursion

Terra Nova, EarlyView.
ABSTRACT Thin, discontinuous, organic‐rich oil shale beds in the siliciclastic‐evaporitic Salt Range Formation (SRF) of Pakistan are of approximate Neoproterozoic to Cambrian age based on stratigraphic constraints. The beds are enriched (26–43 wt.% total organic carbon, TOC) in aliphatic organic matter (OM) of low thermal maturity despite their ...
Paul C. Hackley, Ryan J. McAleer, Jay M. Thompson, Brett J. Valentine, Imran Khan   +4 more
wiley   +1 more source

Chemogenic sediments of Mutnovsky geothermal complex (South Kamchatka)

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2021
By studying the processes taking place at the operating geothermal stations it is possible to model and understand some features of formation of minerals of geothermal origin, processes of transfer by hydrothermal solutions and concentration of some ...
Зобенько О.А., Округин В.М., Чернев И.И., Плутахина Е.Ю., Яблокова Д.А., Карташева Е.В.   +5 more
doaj   +1 more source

Finding of cuprous gold in ferromanganese crust from the Alba Guyot of the Magellan Seamounts

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2022
A 10 μm particle of cuprous gold was found in the phosphate-argillaceous matrix of a three-layer Fe-Mn crust dredged from the Guyot Alba of the Magellan Seamount (Pacific Ocean).
Савельева О.Л., Савельев Д.П., Москалева С.В., Рашидов В.А.   +3 more
doaj   +1 more source

New magnetotelluric soundings in the Mt. Somma-Vesuvius volcanic complex: preliminary results

Annals of Geophysics, 2000
During 1997 ten magnetotelluric (MT) soundings were recorded in single-site mode above the Mt. Somma-Vesuvius volcanic area. A first campaign of MT measurements was carried out, during spring, by the researchers of the University of Padua with their MSPM
A. Zaja, G. Volpi, A. Manzella
doaj   +1 more source

Coastal thermal springs in the central part of Iturup island: macro- and microelement composition

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2022
Based on the results of expeditionary studies (July 2021), geochemical features of thermal waters (natural manifestations and borehole waters) discharging near or directly on the Sea of Okhotsk and Pacific coasts of the central part of Iturup Island were
Kalacheva E.G., Kotenko T.A., Voloshina E.V., Erdniyeva D.Yu.   +3 more
doaj   +1 more source